var Decimal = require("decimal.js");
Decimal8 = Decimal.clone({ precision:8, rounding:8 });

var currencyUnits = [
	{
		type:"native",
		name:"BTC",
		multiplier:1,
		default:true,
		values:["", "btc", "BTC"],
		decimalPlaces:8
	},
	{
		type:"native",
		name:"mBTC",
		multiplier:1000,
		values:["mbtc"],
		decimalPlaces:5
	},
	{
		type:"native",
		name:"bits",
		multiplier:1000000,
		values:["bits"],
		decimalPlaces:2
	},
	{
		type:"native",
		name:"sat",
		multiplier:100000000,
		values:["sat", "satoshi"],
		decimalPlaces:0
	},
	{
		type:"exchanged",
		name:"USD",
		multiplier:"usd",
		values:["usd"],
		decimalPlaces:2,
		symbol:"$"
	},
	{
		type:"exchanged",
		name:"EUR",
		multiplier:"eur",
		values:["eur"],
		decimalPlaces:2,
		symbol:"€"
	},
];

module.exports = {
	name:"Bitcoin",
	ticker:"BTC",
	logoUrlsByNetwork:{
		"main":"/img/logo/btc.svg",
		"test":"/img/logo/tbtc.svg",
		"regtest":"/img/logo/tbtc.svg"
	},
	siteTitlesByNetwork: {
		"main":"Bitcoin Explorer",
		"test":"Testnet Explorer",
		"regtest":"Regtest Explorer"
	},
	siteDescriptionHtml:"<b>BTC Explorer</b> is <a href='https://github.com/janoside/btc-rpc-explorer). If you run your own [Bitcoin Full Node](https://bitcoin.org/en/full-node), **BTC Explorer** can easily run alongside it, communicating via RPC calls. See the project [ReadMe](https://github.com/janoside/btc-rpc-explorer) for a list of features and instructions for running.",
	nodeTitle:"Bitcoin Full Node",
	nodeUrl:"https://bitcoin.org/en/full-node",
	demoSiteUrl: "https://explorer.btc21.org",
	miningPoolsConfigUrls:[
		"https://raw.githubusercontent.com/btccom/Blockchain-Known-Pools/master/pools.json",
		"https://raw.githubusercontent.com/blockchain/Blockchain-Known-Pools/master/pools.json"
	],
	maxBlockWeight: 4000000,
	maxBlockSize: 1000000,
	difficultyAdjustmentBlockCount: 2016,
	maxSupplyByNetwork: {
		"main": new Decimal(20999817.31308491), // ref: https://bitcoin.stackexchange.com/a/38998
		"test": new Decimal(21000000),
		"regtest": new Decimal(21000000)
	},
	targetBlockTimeSeconds: 600,
	targetBlockTimeMinutes: 10,
	currencyUnits:currencyUnits,
	currencyUnitsByName:{"BTC":currencyUnits[0], "mBTC":currencyUnits[1], "bits":currencyUnits[2], "sat":currencyUnits[3]},
	baseCurrencyUnit:currencyUnits[3],
	defaultCurrencyUnit:currencyUnits[0],
	feeSatoshiPerByteBucketMaxima: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 50, 75, 100, 150],
	genesisBlockHashesByNetwork:{
		"main":    "000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f",
		"test":    "000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943",
		"regtest": "0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206"
	},
	genesisCoinbaseTransactionIdsByNetwork: {
		"main":    "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b",
		"test":    "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b",
		"regtest": "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"
	},
	genesisCoinbaseTransactionsByNetwork:{
		"main": {
			"hex": "01000000010000000000000000000000000000000000000000000000000000000000000000ffffffff0804ffff001d02fd04ffffffff0100f2052a01000000434104f5eeb2b10c944c6b9fbcfff94c35bdeecd93df977882babc7f3a2cf7f5c81d3b09a68db7f0e04f21de5d4230e75e6dbe7ad16eefe0d4325a62067dc6f369446aac00000000",
			"txid": "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b",
			"hash": "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b",
			"size": 204,
			"vsize": 204,
			"version": 1,
			"confirmations":475000,
			"vin": [
				{
					"coinbase": "04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73",
					"sequence": 4294967295
				}
			],
			"vout": [
				{
					"value": 50,
					"n": 0,
					"scriptPubKey": {
						"asm": "04f5eeb2b10c944c6b9fbcfff94c35bdeecd93df977882babc7f3a2cf7f5c81d3b09a68db7f0e04f21de5d4230e75e6dbe7ad16eefe0d4325a62067dc6f369446a OP_CHECKSIG",
						"hex": "4104f5eeb2b10c944c6b9fbcfff94c35bdeecd93df977882babc7f3a2cf7f5c81d3b09a68db7f0e04f21de5d4230e75e6dbe7ad16eefe0d4325a62067dc6f369446aac",
						"reqSigs": 1,
						"type": "pubkey",
						"addresses": [
							"1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa"
						]
					}
				}
			],
			"blockhash": "000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f",
			"time": 1230988505,
			"blocktime": 1230988505
		},
		"test": {
			"hex": "01000000010000000000000000000000000000000000000000000000000000000000000000ffffffff4d04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73ffffffff0100f2052a01000000434104678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5fac00000000",
			"txid": "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b",
			"hash": "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b",
			"version": 1,
			"size": 204,
			"vsize": 204,
			"weight": 816,
			"locktime": 0,
			"vin": [
				{
					"coinbase": "04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73",
					"sequence": 4294967295
				}
			],
			"vout": [
				{
					"value": 50.00000000,
					"n": 0,
					"scriptPubKey": {
						"asm": "04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f OP_CHECKSIG",
						"hex": "4104678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5fac",
						"reqSigs": 1,
						"type": "pubkey",
						"addresses": [
							"mpXwg4jMtRhuSpVq4xS3HFHmCmWp9NyGKt"
						]
					}
				}
			],
			"blockhash": "000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943",
			"time": 1296688602,
			"blocktime": 1296688602
		},
		"regtest": {
			"hex": "01000000010000000000000000000000000000000000000000000000000000000000000000ffffffff4d04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73ffffffff0100f2052a01000000434104678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5fac00000000",
			"txid": "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b",
			"hash": "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b",
			"version": 1,
			"size": 204,
			"vsize": 204,
			"weight": 816,
			"locktime": 0,
			"vin": [
				{
					"coinbase": "04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73",
					"sequence": 4294967295
				}
			],
			"vout": [
				{
					"value": 50.00000000,
					"n": 0,
					"scriptPubKey": {
						"asm": "04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f OP_CHECKSIG",
						"hex": "4104678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5fac",
						"type": "pubkey"
					}
				}
			],
			"blockhash": "0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206",
			"time": 1296688602,
			"blocktime": 1296688602
		}
	},
	genesisBlockStatsByNetwork:{
		"main": {
			"avgfee": 0,
			"avgfeerate": 0,
			"avgtxsize": 0,
			"blockhash": "000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f",
			"feerate_percentiles": [
				0,
				0,
				0,
				0,
				0
			],
			"height": 0,
			"ins": 0,
			"maxfee": 0,
			"maxfeerate": 0,
			"maxtxsize": 0,
			"medianfee": 0,
			"mediantime": 1231006505,
			"mediantxsize": 0,
			"minfee": 0,
			"minfeerate": 0,
			"mintxsize": 0,
			"outs": 1,
			"subsidy": 5000000000,
			"swtotal_size": 0,
			"swtotal_weight": 0,
			"swtxs": 0,
			"time": 1231006505,
			"total_out": 0,
			"total_size": 0,
			"total_weight": 0,
			"totalfee": 0,
			"txs": 1,
			"utxo_increase": 1,
			"utxo_size_inc": 117
		},
		"test": {
			"avgfee": 0,
			"avgfeerate": 0,
			"avgtxsize": 0,
			"blockhash": "000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943",
			"feerate_percentiles": [
				0,
				0,
				0,
				0,
				0
			],
			"height": 0,
			"ins": 0,
			"maxfee": 0,
			"maxfeerate": 0,
			"maxtxsize": 0,
			"medianfee": 0,
			"mediantime": 1296688602,
			"mediantxsize": 0,
			"minfee": 0,
			"minfeerate": 0,
			"mintxsize": 0,
			"outs": 1,
			"subsidy": 5000000000,
			"swtotal_size": 0,
			"swtotal_weight": 0,
			"swtxs": 0,
			"time": 1296688602,
			"total_out": 0,
			"total_size": 0,
			"total_weight": 0,
			"totalfee": 0,
			"txs": 1,
			"utxo_increase": 1,
			"utxo_size_inc": 117
		}
	},
	genesisCoinbaseOutputAddressScripthash:"8b01df4e368ea28f8dc0423bcf7a4923e3a12d307c875e47a0cfbf90b5c39161",
	historicalData: [
		{
			type: "blockheight",
			date: "2009-01-03",
			chain: "main",
			blockHeight: 0,
			blockHash: "000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f",
			summary: "The Bitcoin Genesis Block.",
			alertBodyHtml: "This is the first block in the Bitcoin blockchain, known as the 'Genesis Block'. This block was mined by Bitcoin's creator Satoshi Nakamoto. You can read more about <a href='https://en.bitcoin.it/wiki/Genesis_block'>the genesis block</a>.",
			referenceUrl: "https://en.bitcoin.it/wiki/Genesis_block"
		},
		{
			type: "tx",
			date: "2009-01-03",
			chain: "main",
			txid: "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b",
			summary: "The coinbase transaction of the Genesis Block.",
			alertBodyHtml: "This transaction doesn't really exist! This is the coinbase transaction of the <a href='/block/000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f'>Bitcoin Genesis Block</a>. For more background about this special-case transaction, you can read <a href='https://github.com/bitcoin/bitcoin/issues/3303'>this brief discussion</a> among some of the <a href='https://bitcoin.org'>Bitcoin</a> developers.",
			referenceUrl: "https://github.com/bitcoin/bitcoin/issues/3303"
		},
		{
			type: "tx",
			date: "2009-10-12",
			chain: "main",
			txid: "7dff938918f07619abd38e4510890396b1cef4fbeca154fb7aafba8843295ea2",
			summary: "First bitcoin traded for fiat currency.",
			alertBodyHtml: "In this first-known BTC-to-fiat transaction, 5,050 BTC were exchanged for 5.02 USD, at an effective exchange rate of ~0.001 USD/BTC.",
			referenceUrl: "https://twitter.com/marttimalmi/status/423455561703624704"
		},
		{
			type: "blockheight",
			date: "2017-08-24",
			chain: "main",
			blockHeight: 481824,
			blockHash: "0000000000000000001c8018d9cb3b742ef25114f27563e3fc4a1902167f9893",
			summary: "First SegWit block.",
			referenceUrl: "https://twitter.com/conio/status/900722226911219712"
		},
		{
			type: "tx",
			date: "2017-08-24",
			chain: "main",
			txid: "8f907925d2ebe48765103e6845C06f1f2bb77c6adc1cc002865865eb5cfd5c1c",
			summary: "First SegWit transaction.",
			referenceUrl: "https://twitter.com/KHS9NE/status/900553902923362304"
		},
		{
			type: "tx",
			date: "2014-06-16",
			chain: "main",
			txid: "143a3d7e7599557f9d63e7f224f34d33e9251b2c23c38f95631b3a54de53f024",
			summary: "Star Wars: A New Hope",
			referenceUrl: ""
		},
		{
			type: "tx",
			date: "2010-05-22",
			chain: "main",
			txid: "a1075db55d416d3ca199f55b6084e2115b9345e16c5cf302fc80e9d5fbf5d48d",
			summary: "The 'Bitcoin Pizza' transaction.",
			alertBodyHtml: "This is the famous 'Bitcoin Pizza' transaction.",
			referenceUrl: "https://bitcointalk.org/index.php?topic=137.0"
		},
		{
			type: "tx",
			date: "2011-05-18",
			chain: "main",
			txid: "5d80a29be1609db91658b401f85921a86ab4755969729b65257651bb9fd2c10d",
			summary: "Destroyed bitcoin.",
			referenceUrl: "https://bitcointalk.org/index.php?topic=7253.msg184414#msg184414",
			referenceUrl2: "https://www.reddit.com/r/Bitcoin/comments/7mhoks/til_in_2011_a_user_running_a_modified_mining/"
		},
		{
			type: "blockheight",
			date: "2009-01-12",
			chain: "main",
			blockHeight: 170,
			blockHash: "00000000d1145790a8694403d4063f323d499e655c83426834d4ce2f8dd4a2ee",
			summary: "First block containing a (non-coinbase) transaction.",
			alertBodyHtml: "This block comes 9 days after the genesis block and is the first to contain a transfer of bitcoin. Before this block all blocks contained only coinbase transactions, which mint new bitcoin.<br/>See transaction #1 (f4184fc…) below for more info.",
			referenceUrl: "https://bitcointalk.org/index.php?topic=91806.msg1012234#msg1012234"
		},
		{
			type: "tx",
			date: "2009-01-12",
			chain: "main",
			txid: "f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16",
			summary: "The first transfer of bitcoin.",
			alertBodyHtml: "This transaction represents the first ever transfer of bitcoin from one person to another. It also has the added distinction of being (one of?) the only known transfers of bitcoin from Satoshi Nakamoto, in this case sending bitcoin to Hal Finney as a test."
		},
		{
			type: "blockheight",
			date: "2017-08-25",
			chain: "main",
			blockHeight: 481947,
			blockHash: "00000000000000000139cb443e16442fcd07a4a0e0788dd045ee3cf268982016",
			summary: "First block mined that was greater than 1MB.",
			referenceUrl: "https://en.bit.news/bitfury-mined-first-segwit-block-size-1-mb/"
		},
		{
			type: "blockheight",
			date: "2018-01-20",
			chain: "main",
			blockHeight: 505225,
			blockHash: "0000000000000000001bbb529c64ddf55edec8f4ebc0a0ccf1d3bb21c278bfa7",
			summary: "First block mined that was greater than 2MB.",
			referenceUrl: "https://twitter.com/BitGo/status/954998877920247808"
		},
		{
			type: "tx",
			date: "2017-12-30",
			chain: "main",
			txid: "9bf8853b3a823bbfa1e54017ae11a9e1f4d08a854dcce9f24e08114f2c921182",
			summary: "Block reward lost",
			alertBodyHtml: "This coinbase transaction completely fails to collect the block's mining reward. 12.5 BTC were lost.",
			referenceUrl: "https://bitcoin.stackexchange.com/a/67012/3397"
		},
		{
			type:"address",
			date:"2011-12-03",
			chain: "main",
			address:"1JryTePceSiWVpoNBU8SbwiT7J4ghzijzW",
			summary:"Brainwallet address for 'Satoshi Nakamoto'",
			referenceUrl:"https://twitter.com/MrHodl/status/1041448002005741568",
			alertBodyHtml:"This address was generated from the SHA256 hash of 'Satoshi Nakamoto' as example of the 'brainwallet' concept."
		},
		{
			type: "tx",
			date: "2010-11-14",
			chain: "main",
			txid: "e3bf3d07d4b0375638d5f1db5255fe07ba2c4cb067cd81b84ee974b6585fb468",
			summary: "Duplicated coinbase transaction #1",
			referenceUrl: "https://bitcoin.stackexchange.com/questions/38994/will-there-be-21-million-bitcoins-eventually/38998#38998",
			alertBodyHtml: "This is one of 2 'duplicate coinbase' transactions. An early bitcoin bug (fixed by <a href='https://github.com/bitcoin/bips/blob/master/bip-0030.mediawiki'>BIP30</a>) allowed identical coinbase transactions - a newer duplicate would overwrite older copies. This transaction was the coinbase transaction for <a href='/block-height/91722'>Block #91,722</a> and, ~16 hours later, <a href='/block-height/91880'>Block #91,880</a>. The 50 BTC claimed as the coinbase for block 91,722 were also overwritten and lost."
		},
		{
			type: "tx",
			date: "2010-11-14",
			chain: "main",
			txid: "d5d27987d2a3dfc724e359870c6644b40e497bdc0589a033220fe15429d88599",
			summary: "Duplicated coinbase transaction #2",
			referenceUrl: "https://bitcoin.stackexchange.com/questions/38994/will-there-be-21-million-bitcoins-eventually/38998#38998",
			alertBodyHtml: "This is one of 2 'duplicate coinbase' transactions. An early bitcoin bug (fixed by <a href='https://github.com/bitcoin/bips/blob/master/bip-0030.mediawiki'>BIP30</a>) allowed identical coinbase transactions - a newer duplicate would overwrite older copies. This transaction was the coinbase transaction for <a href='/block-height/91812'>Block #91,812</a> and, ~3 hours later, <a href='/block-height/91842'>Block #91,842</a>. The 50 BTC claimed as the coinbase for block 91,812 were also overwritten and lost."
		},
		{
			type: "tx",
			date: "2020-03-11",
			chain: "main",
			txid: "eeea72f5c9fe07178013eac84c3705443321d5453befd7591f52d22ac39b3963",
			summary: "500+ million USD transferred for < 1 USD fee (2020 prices)."
		},


		// testnet
		{
			type: "blockheight",
			date: "2011-02-02",
			chain: "test",
			blockHeight: 0,
			blockHash: "000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943",
			summary: "The Bitcoin (regtest) Genesis Block.",
			alertBodyHtml: "This is the first block in the Bitcoin blockchain, known as the 'Genesis Block'. You can read more about <a href='https://en.bitcoin.it/wiki/Genesis_block'>the genesis block</a>.",
			referenceUrl: "https://en.bitcoin.it/wiki/Genesis_block"
		},
		{
			type: "tx",
			date: "2011-02-02",
			chain: "test",
			txid: "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b",
			summary: "The coinbase transaction of the Genesis Block.",
			alertBodyHtml: "This transaction doesn't really exist! This is the coinbase transaction of the <a href='/block/000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f'>Bitcoin Genesis Block</a>. For more background about this special-case transaction, you can read <a href='https://github.com/bitcoin/bitcoin/issues/3303'>this brief discussion</a> among some of the <a href='https://bitcoin.org'>Bitcoin</a> developers.",
			referenceUrl: "https://github.com/bitcoin/bitcoin/issues/3303"
		},


		// regtest
		{
			type: "blockheight",
			date: "2011-02-02",
			chain: "regtest",
			blockHeight: 0,
			blockHash: "0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206",
			summary: "The Bitcoin (regtest) Genesis Block.",
			alertBodyHtml: "This is the first block in the Bitcoin blockchain, known as the 'Genesis Block'. You can read more about <a href='https://en.bitcoin.it/wiki/Genesis_block'>the genesis block</a>.",
			referenceUrl: "https://en.bitcoin.it/wiki/Genesis_block"
		},
		{
			type: "tx",
			date: "2011-02-02",
			chain: "regtest",
			txid: "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b",
			summary: "The coinbase transaction of the Genesis Block.",
			alertBodyHtml: "This transaction doesn't really exist! This is the coinbase transaction of the <a href='/block/000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f'>Bitcoin Genesis Block</a>. For more background about this special-case transaction, you can read <a href='https://github.com/bitcoin/bitcoin/issues/3303'>this brief discussion</a> among some of the <a href='https://bitcoin.org'>Bitcoin</a> developers.",
			referenceUrl: "https://github.com/bitcoin/bitcoin/issues/3303"
		},
	],
	exchangeRateData:{
		jsonUrl:"https://api.coindesk.com/v1/bpi/currentprice.json",
		responseBodySelectorFunction:function(responseBody) {
			//console.log("Exchange Rate Response: " + JSON.stringify(responseBody));

			var exchangedCurrencies = ["USD", "GBP", "EUR"];

			if (responseBody.bpi) {
				var exchangeRates = {};

				for (var i = 0; i < exchangedCurrencies.length; i++) {
					if (responseBody.bpi[exchangedCurrencies[i]]) {
						exchangeRates[exchangedCurrencies[i].toLowerCase()] = responseBody.bpi[exchangedCurrencies[i]].rate_float;
					}
				}

				return exchangeRates;
			}
			
			return null;
		}
	},
	blockRewardFunction:function(blockHeight, chain) {
		var eras = [ new Decimal8(50) ];
		for (var i = 1; i < 34; i++) {
			var previous = eras[i - 1];
			eras.push(new Decimal8(previous).dividedBy(2));
		}

		var halvingBlockInterval = (chain == "regtest" ? 150 : 210000);
		var index = Math.floor(blockHeight / halvingBlockInterval);

		return eras[index];
	}
};